ISOTHERMAL CRYSTALLIZATION AND MELTING OF ETHYLENE OXIDEPROPYLENE OXIDE COPOLYMER

Chinese Journal of Applied Chemistry ›› 1993, Vol. 0 ›› Issue (6): 66-70.

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ISOTHERMAL CRYSTALLIZATION AND MELTING OF ETHYLENE OXIDEPROPYLENE OXIDE COPOLYMER

Qi Li, Song Yongxian, Peng Xinsheng, Cben Donglin

Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun

Received:1993-03-27 Revised:1993-09-18 Published:1993-12-10 Online:1993-12-10

Abstract

Abstract: The kinetics of isothermal crystallization of ethylene oxide and propylene oxide copolymers has been investigated by differential scanning calorimetry. The values of Avrami exponent n were found as 1.8～2.4. The nueleanlon process in crystallization temperature takes place according to regime Ⅱ The eqilibrium melting points of EO/PO copolymer decrease with increasing content of PO. The crystal growtb rate Gis in dependence on the composition of the copolymer and the crystalization temparature.

Key words: ethylene oxide, propylene oxide, copolymer, isothermal crystallization, kinetics

Qi Li, Song Yongxian, Peng Xinsheng, Cben Donglin. ISOTHERMAL CRYSTALLIZATION AND MELTING OF ETHYLENE OXIDEPROPYLENE OXIDE COPOLYMER[J]. Chinese Journal of Applied Chemistry, 1993, 0(6): 66-70.

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ISOTHERMAL CRYSTALLIZATION AND MELTING OF ETHYLENE OXIDEPROPYLENE OXIDE COPOLYMER

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